British adventurer Dan Martin is about to embark on an epic challenge that he calls the Global Triathlon. The journey, which is set to get underway from New York City any day now, will see Dan circling the globe completely under his own power, and just like any other triathlon he’ll be swimming, cycling and running the various legs. In this case, those legs just happen to be substantially longer.

All triathlons, regardless of length, always start with a swim and Dan’s is no different. In this case, however, that swim involves crossing the Atlantic Ocean. He’ll first enter the water in the Hudson River and start heading east, continuing to do so until he makes landfall in France. Along the way, Dan will be escorted by a support boat, which is where he’ll sleep, eat and rest while en route. At the end of each day, he’ll crawl on to the boat, replace as many burned calories as he can and try to regain his strength for the next day, when he’ll return to the water and continue on.

To date, only one other person has managed to swim across the Atlantic. Back in 1998, French long distance swimmer Benoit Lecomte managed to accomplish that feat in just over 73 days. Lecomte’s efforts are contested by some, however, because he didn’t use a GPS to strictly track his progress. Dan hopes to allow others to follow his progress via his website, keeping the world updated on his position at all times.Once he does arrive in France the cycling stage of the journey will begin. Dan will climb aboard his bike and start peddling across Europe and Asia – in the dead of winter no less. If everything goes as planned he’ll eventually end the bike ride in the city of Anadyr, located in Russia’s far east. From there he’ll hop across the Bering Sea and start the finale leg of the Global Triathlon, running from Uelen, Alaska, back to New York City. When he’s done, Martin expects to have covered roughly 18,640 miles.

Dan actually thought that he would be underway by now, but a few logistical hiccups have prevented him from getting started on time. Nonetheless, he and his support crew are currently in NYC and they hope to have everything ironed out soon. You can follow his progress and updates both on his Facebook page and through his Twitter feed.